WEBVTT Tonight... Family and friends are mourning the loss of a local father who died last night during an off- roading accident. Ryan Smith is live at Gray's lake where a vigil for 21- year-old Matthew Blackford ended a short time ago... This parking lot at Gray's lake was elbow to elbow - packed with people paying their respects to a local father who was killed doing something that he loved. PKG: Family and friends marked their favorite memories of Matthew Blackford by signing his beloved Honda Civic. Dozens gathered on the southside of Gray's Lake to honor the 21- year-old, 24 hours after he was killed while mudding with friends near the des moines river. 6.33 "WE PULLED HIM OUT, PUT HIM IN MY JEEP AFTER TRYING TO GIVE HIM CPR, PULLED MY JEEP SEATS DOWN AND HE LAYED ON MY CHEST. I SAID IT'S OK MAN, EVERYTHING'S GOING TO BE ALRIGHT. WE'RE GOING TO GET SOME HELP." According to police, Blackford was driving a Jeep Cherokee when it got stuck near the water. The cause of death is under investigation, but because the exhaust pipe was underwater, police say carbon monoxide poisoning may be a factor. :51 "HE'S A LOVING FRIEND, CARING FATHER, A GREAT PERSON OVERALL." Blackford's cousin says the vigil's attendance is proof he will be deeply missed. Blackford leaves behind a 14-month old daughter, McKenna. 1.40 "IT'S JUST ANOTHER TESTIMONY TO WHAT KIND OF MAN MATTHEW WAS. OUR FAMILY IS STRONG IN FAITH AND WE GOT TO BE THAT WAY." Funeral plans are pending. Family members tell me, they plan to set up a memorial fund in his name tomorrow at the Wells Fargo Bank on Army Post Road.